package com.ds.common.org.expression.person;

import java.util.Stack;

import com.ds.common.expression.ParseException;
import com.ds.common.expression.function.Function;
import com.ds.org.Person;

 /** 
 * <p>Title: JDSORG组织机构中间件</p>
 * <p>Description:
 * 3.1.26.	判断两个人员是否是同一个人 <br>
   Boolean SamePerson(Person person1, Person person2)<br>
   参数：person1 - 比较两个人中的一个<br>
      person2 - 比较得两个人中的另一个 <br>
   返回值：如果两个人是同一个人（人员ID相同）返回True，否则返回False。<br>
 </p>
 * <p>Copyright: jds Copyright (c) 2003-2008</p>
 * <p>Company: www.justdos.net</p>
 * @author lxl
 * @version 2.0
 */
public class SamePerson extends Function {
	public SamePerson() {
		numberOfParameters = 2;
	}

	public void run(Stack stack) throws ParseException
	{
		checkStack(stack); // check the stack
		Object param2 = stack.pop();
		Object param1 = stack.pop();
		stack.push(perform(param1, param2));
	}

	protected Boolean perform(Object param1, Object param2) throws ParseException {
		if (param1 == null || param2 == null) {
			return Boolean.FALSE;
		}
		if (param1 instanceof Person && param2 instanceof Person) {
			Person person1 = (Person)param1;
			Person person2 = (Person)param2;
			if(person1.getID() == null) {
			    return Boolean.FALSE;
			}
			return Boolean.valueOf(person1.getID().equalsIgnoreCase(person2.getID()));
		}
		throw new ParseException("Invalid parameter type in:" + this.getClass().getName() + ", param1 is " + param1.getClass().getName() + ", param2 is " + param2.getClass().getName());
	}
}
